Core covering machine



Nov. s, 1938. I J. PpSHORROCK v 2,136,026

CORE COVERING MACHINE Filed Sept. 22', 1957 INVENT OR.

ATTORNEY.

Patented Nov. 8, 1938 UNITED STATES PATENT OFFICE CORE COVERING MACHINE Application September 22, 1937, Serial No. 165,116

1 Claim.

This invention relates to improvements in apparatus for covering cores such as cores of rubber or the like as is set forth in the patents to Getchel 1,970,228 and Cobb 1,976,328.

The principal objects of the invention are directed tothe provision of means associated with machines such as shown in the patents above referred to, for equalizing the tension of the core for the covering operation.

In the machine of Cobb Patent the rubber core is unwound from a spool but since the tension of the core varies while it is wound on the spool it necessarily varies as it is unwound therefrom.

When small cords of rubber are covered it is essential that there be a very definite and uniform amount of tension but since the tension of the core as it is wound on to the supply spool varies there is a variation on unwinding whereby the covered core varies objectionably. According to this invention means is provided for equalizing the tension to facilitate producing covered core which is of uniform tension.

Various novel features and advantages of the invention will be hereinafter more fully referred to in connection with the accompanying description of the invention with reference to the drawing wherein:

Fig. 1 is a partial side elevational and sectional view of an apparatus with which this invention is associated, such parts as the drive, gearing and frame construction being omitted for the sake of simplicity.

Fig. 2 is a front elevational view of the lower part of the apparatus shown in Fig. 1, and

Fig. 3 is a plan view of the principal parts shown in Fig. 2.

In the preferred embodiment of the invention the core is represented by 2 which is of elastic material such as rubber. The core 2 is led from a spool 4 the shaft 6 for which is receivable in slots 8 of arms ill on the lower end of the rods 12 which descend from a yoke I4.

The yoke I4 is carried on the lower end of a rod l6 which is reciprocable up and down in a part ll! of a frame. As the rod moves upwardly the spool 4 is moved upwardly. Normally the core on the spool rests. on a drive roll] which rotates to rotate spool 4 and unwind the core 2.

A motor 20 is mounted on the frame, as shown, and it has a hollow spindle 22 which carries a spool of covering yarn 24. The motor rotates the spindle and spool so that the yarn is served on tothe core which passes upwardly through the spindle to and through another spindle and a take-up as in the patents previously referred to.

A braking mechanism indicated by 26 is associated with the motor 20 and it is operated by a 'lever 28 pivoted at 30 to a bracket 32. The said lever 28 is actuated by collar l8 on the rod I6 as the rod'is reciprocated.

As previously stated, since the tension of the core, when it is wound on the spool varies its tension also varies when it is unwound therefrom,,but I have found that the tension is readily equalized or made uniform by means of the following:

A bracket 34 fixed on a rod 36 has fixed in its outer end a member 38 on which is rotatable a hub 40 on which is a pair of grooved wheels 42. A rear extension 44 of member 34 has pivoted thereto at 46 a grooved wheel 48.

The core 2 is led up from spool 4 and. over one of the wheels 42, rearwardly around the wheel 48 and then upwardly around the other wheel 42 into and through a guide 50 which is fixed to rod 36 and finally into hollow spindle 22. To retard the rotation of the wheels 42 a member 52 in the form of a band frictionally engages the hub 40 of the wheel. The end of the band is secured to an extension 39 of the member 38 and its other end carries a weight 54.

The core causes the wheels 42 to be rotated which rotation is resisted by the friction device so that the tension of the core from the spool 4 to the spindle is adjusted, or the tension is adjusted so the core enters the spindle at uniform tension.

Having described the invention in the form at present preferred, what it is desired to claim and secure by Letters Patent of the United States is:

An apparatus for winding elastic core with yarn comprising in combination, a driving roll for supporting a spool on whch is wound a core, a rotatable hollow spindle thereabove for receiving a core, a guide for a core below said spindle, and tension means between said guide and support for delivering a core from a spool thereon to said guide under tension including, a support having a pair of unitary grooved wheels rotatable thereon with the periphery of said groves in substantial alignment with said guide, a third grooved wheel rotatable on said support at a side of said pair of wheels, and a weighted flexible member having one end secured to said support and a part frictionally engaging one of said first-named grooved wheels, all adapted and arranged whereby a core from a spool may be led therefrom around one of said first-named wheels onto said third-named wheel and around the other of the first-named wheels and then to said guide.

JAMES P. SHORROCK. 

